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Table 6 Item parameters of the non-PROMIS items after Stocking-Lord linking

From: Correction to: Establishing a common metric for patient-reported outcomes in cancer patients: linking patient reported outcomes measurement information system (PROMIS), numerical rating scale, and patient-reported outcomes version of the common terminology criteria for adverse events (PRO-CTCAE)

NRS a b1 b2 b3 b4 b5 b6 b7 b8 b9 b10 SL1
A
SL
B
Anxiety 2.99 −0.63 −0.08 0.33 0.63 0.85 1.13 1.41 1.73 2.16 2.79 0.96 −0.00
Depression 3.75 −0.23 0.20 0.51 0.80 1.01 1.30 1.47 1.82 2.22 2.61 0.90 − 0.20
Fatigue 3.34 −0.97 −0.41 − 0.06 0.28 0.50 0.85 1.13 1.59 2.18 2.59 0.84 0.26
Pain intensity 3.26 −0.94 −0.20 0.32 0.75 1.02 1.40 1.77 2.16 2.71 3.15 1.59 −0.26
Sleep disturbance 2.66 −1.65 −0.98 −0.32 0.16 0.49 0.92 1.25 1.72 2.31 2.70 1.00 −0.05
PRO-CTCAE              
Anxiety severity 3.68 −0.38 0.65 1.59 2.47        0.96 −0.00
Anxiety frequency 3.95 −0.47 0.39 1.33 2.30        0.96 −0.00
Anxiety interference 3.43 0.34 1.09 1.83 2.56        0.96 −0.00
Depression: How often did you feel nothing could cheer you up? 4.07 0.06 0.81 1.58 2.22        0.90 −0.20
Depression: How often did you have sad/unhappy feelings? 3.96 −0.74 0.33 1.26 2.28        0.90 −0.20
Depression: How much did feeling nothing could cheer you up interfere with activities? 4.11 0.34 1.08 1.73 2.39        0.90 −0.20
Depression: How much did sad/unhappy feelings interfere with activities? 3.90 0.15 0.94 1.62 2.32        0.90 −0.20
Depression: What was the severity of feelings that nothing could cheer you up at the worst? 4.61 0.20 0.89 1.71 2.40        0.90 −0.20
Depression: What was the severity of your sad/unhappy feelings at the worst? 3.80 −0.55 0.61 1.61 2.14        0.90 −0.20
Fatigue interference 4.95 −0.42 0.43 1.14 1.99        0.84 0.26
Fatigue severity 3.89 −0.85 0.25 1.24 2.06        0.84 0.26
Pain intensity 4.42 −1.02 0.36 1.43 2.47        1.58 −0.26
Pain interference 4.67 0.14 0.85 1.46 2.14        1.14 0.27
Sleep interference 2.90 −0.23 0.63 1.49 2.47        1.00 −0.05
Sleep severity 3.54 −0.58 0.25 1.28 2.23        1.00 −0.05
  1. 1SL A: Stocking-Lord multiplicative constant, SL B: Stocking-Lord additive constant. Stocking-Lord’s A and B constants are computed from the two sets of parameters for the common items so that their test characteristic curves become as similar as possible